Sound
What is the type of wave that sound travels as?
Longitudinal wave
What type of wave is light?
Transverse electromagnetic wave
What is the highest point of a wave called?
Crest
What does EM stand for in the electromagnetic spectrum?
Electromagnetic
What are the two poles of a magnet called?
North and South poles
😂 If your friend sings off-key during karaoke night, which property of sound is most likely out of tune?
🎤 Frequency! (Their pitch is off — not their enthusiasm.)
What happens when light bounces off a surface?
Reflection
What is the distance between two consecutive crests called?
Wavelength
Which type of EM wave has the longest wavelength?
Radio waves
Like poles _____ and unlike poles _____.
repel; attract
Sound waves cannot travel through what type of medium?
Vacuum
When light passes from air into glass, it bends. What is this effect called?
Refraction
Write the formula that relates wave speed, frequency, and wavelength.
v=fλ
Which type of EM wave is used for sterilizing medical equipment?
Ultraviolet (UV) Rays or Gamma Rays
What happens when a bar magnet is broken into two pieces?
Each piece becomes a smaller magnet with its own north and south poles.
A sound wave has a frequency of 200 Hz and a wavelength of 1.7 m. What is its speed?
v=fλ=200×1.7=340 m/s
A ray of light travels from air (n = 1.0) into water (n = 1.33) at an angle of incidence 30°. Find the angle of refraction.
Use Snell’s Law: 1.0 sin 30 = 1.33 sin r = 22° (approx.)
A wave has a frequency of 50 Hz and travels at 25 m/s. What is its wavelength?
λ=v/f=25/50=0.5 m
Arrange these in order of increasing frequency: visible light, X-rays, infrared.
Infrared → Visible → X-rays
What is the region around a magnet where a magnetic force can be detected called?
Magnetic Field
Explain why you see lightning before you hear thunder.
Light travels much faster than sound, so light reaches your eyes before sound reaches your ears.
Explain why a pencil looks bent when placed in a glass of water.
Refraction causes light to change direction when passing between air and water, making the pencil appear displaced.
Describe what happens to frequency, wavelength, and speed when a wave passes from one medium to another.
Frequency stays the same; wavelength and speed change depending on the medium.
A photon has a wavelength of 6.0×10-7m. What is its frequency? (Speed of light = 3.0×108m/s)
f=v/λ=(3.0×108)/(6.0×10-7)=5.0×1014 Hz
🧲 Why did the magnet get detention?
It couldn’t resist being attracted to the wrong pole! 😂